.eslintrc.json

{
  "env": {
    "browser": true,
    "commonjs": true,
    "es6": true,
    "node": true,
    "mocha": true
  },
  "plugins": ["jsdoc", "sort-keys-fix", "sort-requires", "node", "regexp"],
  "extends": ["eslint:recommended", "plugin:regexp/recommended"],
  "globals": {
    "Atomics": "readonly",
    "SharedArrayBuffer": "readonly"
  },
  "parserOptions": {
    "ecmaVersion": 2020,
    "sourceType": "module"
  },
  "settings": {
    "jsdoc": {
      "mode": "closure",
      "tagNamePreference": {
        "returns": "returns",
        "augments": "extends"
      }
    }
  },
  "rules": {
    "no-console": "error",
    "no-labels": "error",
    "max-classes-per-file": "error",
    "eqeqeq": "error",
    "curly": "error",
    "default-case-last": "error",
    "block-scoped-var": "error",
    "no-new": "error",
    "no-multi-str": "error",
    "no-multi-spaces": ["error", { "ignoreEOLComments": true }],
    "no-new-wrappers": "error",
    "no-sequences": "error",
    "no-self-compare": "error",
    "no-multi-assign": "error",
    "no-whitespace-before-property": "error",
    "no-magic-numbers": ["off", { "ignoreArrayIndexes": true }],
    "no-unused-vars": ["error", { "args": "none" }],
    "semi": ["error", "always"],
    "quotes": ["error", "double"],
    "indent": [
      "error",
      4,
      {
        "SwitchCase": 1
      }
    ],
    "brace-style": ["error", "1tbs"],
    "no-trailing-spaces": ["error", { "ignoreComments": true }],
    "keyword-spacing": "error",
    "eol-last": ["error", "always"],
    "jsdoc/check-alignment": "error",
    "jsdoc/check-param-names": "error",
    "jsdoc/check-tag-names": "error",
    "jsdoc/check-types": "error",
    "jsdoc/implements-on-classes": "error",
    "jsdoc/newline-after-description": "error",
    "jsdoc/no-undefined-types": "error",
    "jsdoc/require-param": "error",
    "jsdoc/require-param-name": "error",
    "jsdoc/require-param-type": "error",
    "jsdoc/require-returns-check": "error",
    "jsdoc/require-returns-type": "error",
    "sort-requires/sort-requires": "warn",
    "operator-linebreak": ["error", "after"],
    "no-unneeded-ternary": ["error", { "defaultAssignment": false }],
    "arrow-body-style": ["error", "always"]
  },
  "overrides": [
    {
      "files": ["lib/**/index.js"],
      "rules": {
        "sort-keys-fix/sort-keys-fix": "warn"
      }
    },
    {
      "files": ["index.js", "lib/**/*.js", "util/**/*.js"],
      "parserOptions": {
        "ecmaVersion": 2020
      },
      "extends": ["eslint:recommended", "plugin:node/recommended"],
      "rules": {
        "no-process-exit": "off",
        "node/no-process-exit": "off"
      }
    }
  ]
}